In a deleted scene¹, Hagrid meets up with Harry after Harry overhears the Hufflepuffs discussing him as being the Heir of Slytherin in study hall. It was written in blood it doesn't say what kind or from whom/what the blood is coming from.Ī couple other tidbits from the movie Chamber of Secrets that might be relevant: This is your basic answer according to movie canon. In the movie there is no mention of paint. It's written in blood.' Two things: Hermione is rarely wrong and the writers needed the audience to know the messages were written in blood.
When Harry, Ron, and Hermione discover the first message written on the wall, when Filch's cat is petrified, Hermione says, 'The Chamber of Secrets has been opened. Okay, since your question is specifically about Harry Potter and the Chamber of Secrets the movie, I'm going to answer based only on the film and plot points from the film.
